int tcp_port = 80;
String server_name = argv.length == 0 ? "localhost" : argv[0];
try {
Socket sock = new Socket(server_name, tcp_port);
/* Finally, we can read and write on the socket. */
System.out.println(" *** Connected to " + server_name + " ***");
/* ... */
sock.close();
} catch (UnknownHostException e) {
System.err.println(server_name + " Unknown host");
return;
} catch (NoRouteToHostException e) {
System.err.println(server_name + " Unreachable" );
return;
} catch (ConnectException e) {
System.err.println(server_name + " connect refused");
return;
} catch (java.io.IOException e) {
System.err.println(server_name + ' " + e.getMessage());
return;
}
